Lock for lamp doors



Apr. 17, 1923.

Filed March 25 1920 ATTOF/VKK Patented Apr. l7, i923.

EDWARD DRIEDEEEZ'ER. F

CIIIJCINKIKTI, OHIO, ASSIGNOR TO THE K-IULAMP GOIvIlANY, OF CINCINNATI,OHIO, A CORPOBATIOTE OF OHIO.

LOOK FOR LAMP DOORS.

Application filed March 25, 1920.

To all whom it may, concern:

Be it known that I. l lnwnno Tl. Dinn- MEYER, a citizen ol the UnitedStates, and resident of Cincinnati in the county of Hamilton and titateof Ohio, have invented a certain new and useful Improvement in Locks torLamp Doors, of which the following a full, clear, and exact description,rclrrence being had to the accompanying drawings, forming a part of thisspec-ilication.

The present invention relates to looks for amp doors and particularly tosuch as are designed for use on automobile headlamps.

By reason of the continual vibration and shock to which the headlamps ofautomobiles are subjected, the doors, containing the front lenses orglasses. frequently become loosened and are broken or lost. It is to theprovision of a simple and eflicientlock, wl erehy the difficultiesmentioned are overcome. that the present invention is directed.

A further object of the invention is to provide a lock for a lampclosure. of neat and uimhstrusive tllflX-BfllilllCfl as not to detractfrom the desi n and outline of the lamp itself.

Other objects of the invention will appear from the following detaileddescription thereof.

in the drawings:

Figure l. is a trout view of a headlamp equipped. with a lockconstructed in accordance with. the present invention. parts beinghrolren away;

Figure 2 is a top view of said lamp:

Figure 3 is a perspective of a portion of the loclr.

The numeral 1 indicates the casing of ordinary headlamp. The front ofsaid casing is provided with an annular flange 9,. over which he flange3 of the closure Frame 4 is adapted to fit in the usual manner. Theflange 2 is provided. with a plural itv ot slots 5. preterahly four innumber. The slots 5. as indicated in Figure 3 are angularlv disposedwith reference to the front edge ot the flange 2. the angle ofinclination being iinitorm in all of the slots The flange 2.. in troutoi? the slots 5. is provided with bent-in portions or depressions SerialNo. 868,688.

6; these depressions or grooves are disposed so as to communicate withthe ends of the slots nearest the front edge of the flange.

The flange 3 of the closure frame is provided with a plurality of pinsor studs 7 having external heads 8. The pins 7 are arranged to passthrough the grooves 6 and upon rotation of the closure upon the flange 2to enter the slots 5. The front edges of the slots acting against thepins 7 during the rotation of the closure draw the closure tightlyagainst the front edge of the flange 2.

The body of the lamp has riveted thereto a spring clip 9 which extendsover the flange 2, at an elevation just sufficient to permit the entryof the flange 3 of the closure frame 4:. The clip 9 is providedfurthermore with a perforation 10, which is disposed over the rear endof one of the slots 5, so that when the closure is placed on the lampand rotated to position as above indicated. one of the heads 8 willengage in the perforation 10 of the spring clip, to lock the closureupon the lamp.

From the foregoing description the nature and advantage of the presentinvention will be apparent to those skilled in the art to which the sameappertains. Then the closure is placed on the lamp and rotated intoposition. the head 8 of one of the lock pins 7 enters the perforation 10of the clip which immediately springs downwardly over the same.effectually locking the closure against rotation. and thus againstremoval from the lamp. It will be seen thus. that by reason of theseveral features of construction above described. a simple, neat andefficient lock is provided, whereby the removal and loss of the closureis absolutely prevented. The mechanism described heing simple inconstruction it will be understood furthermore that the same isextremely inexpensive in manufacture as well. in its ap plication to thelamps.

Having thus fully described my invention, what I claim as new and desireto secure by Letters Patent. is:

lock for lamp closures comprising the combination with a body having aflange provided with slots ansulflrly disposed With reference to thefront edge of said flange,

of the former upon the latter, external heads on said lock pins, and aspring clip on the body of said lamp, said clip having a perforationarranged to engage one of said heads when the closure is rotated so thatthe pins are in the extreme ends of the slots away from said grooves, tosecure the closure against rotation.

EDWARD W. DRIEMEYEsR.

